Do you mean the conditions in your surveys built with 1.8 don't work anymore or can't you generally not create any conditions?

Have a look at the manual! It is a really valuable source for information. Here some helpful links:Manual (EN) | Question Types | [url=https://manual.limesurvey.org/Workarounds[/url]
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There has been quite time between 1.8 and 2.0 and thus a lot of changes.

I am not an expert on this, but I can imagine that there have been changes to the system how conditions have been handled.

What happens if you create the condition new?

Have a look at the manual! It is a really valuable source for information. Here some helpful links:Manual (EN) | Question Types | [url=https://manual.limesurvey.org/Workarounds[/url]
If you found this answer helpful and it saved you some time please consider a [url=https://donate.limesurvey.org[/url] to the...

Have a look at the manual! It is a really valuable source for information. Here some helpful links:Manual (EN) | Question Types | [url=https://manual.limesurvey.org/Workarounds[/url]
If you found this answer helpful and it saved you some time please consider a [url=https://donate.limesurvey.org[/url] to the...